From the photos, it doesn't look like you can charge while listening to headphones. If true, that's a pretty huge downside. The only option would be to spend more money on wireless headphones of some kind.
Why are so many people charging their phones and listening to music?? Do you all really do this so much? If so, why? If I can charge my phone then it's likely i'm somewhere I can use another device - eg my home cinema, my home hi-fi or my home recording studio setup...why would I be using headphones in my iPhone if I have access to these?